Entity-524
Nickname: "Playtime"
Entity Rank: Para-Insecure
About Entity-524:
Entity-524, or "Playtime" is an entity that looks like a little girl, and appears to almost have a black and white filter enabled on her clothing and body parts. She appears to be wearing old clothing from possibly the 1800s or early to mid 1900s. She is 4 foot, 1 inch, and appears to be an 8 year old, and has black eyes. She does not age, and she does not grow shorter or taller. Whenever test subjects or random people are exposed to Entity-524, she always asks them "Do you want to play teacup with me?" and for reasons unknown, no matter who it is, the test subject always replies with a yes. Everything at first appears normal, but after 5 minutes, she starts to laugh. Still seems normal, until 10 minutes pass by, and she starts to laugh even louder. Then, 20 minutes pass by and she starts to laugh very loudly, which seems abnormal. But then, after 30 minutes, she starts to laugh so loud, it breaks test subject's eardrums. People nearby also have their eardrums exploded by how loud she starts to laugh. Also after 30 minutes, she opens her mouth extremely wide and her teeth become extremely sharp fangs, even though she never attacks test subjects with her teeth.
Playing with her for over 30 minutes isn't the only way test subject's eardrums are exploded. Anytime you mention her parents, no matter who it is, she starts to cry and wail so loud, it also explodes eardrums. This also causes her to open her mouth unproportionally wide, and her teeth become sharp fangs, similar to when you play with her for over 30 minutes. Again though, she never attacks people with her sharp fangs.
How To Contain Entity-524:
If Entity-524 escapes containment, an FPD Task Force officer must go to her with noise cancelling headphones, and grab her by the hand and take her back to her containment cell. Her containment cell must always have a table and two chairs in the middle of the cell. It also must have a dollhouse in either corners.
If Entity-524 escapes containment, and is crying or laughing extremely loudly, FPD Task Force are to shut all doors surrounding the Entity. After the Task Force enclose her in a space, an FPD Task Force officer is to wait till she calms down, and once she calms down, an FPD Task Force officer is to have noise cancelling headphones and go to her and hold her hand and walk her back to her containment cell.

You can use this Entity to serve as an example. Entity-524 is part of Season 0 of FPD Entities & UUEs